The Sainsbury Body: the Meccano Set, STL2477 (Total 1)

In 1950, when London Transport was facing a desperate shortage of serviceable
bodies during the post-war traffic boom, STL 2477 was rebodied. The new body
contained a high proportion of pre-fabricated or replaceable parts,
and was designed to ease body maintenance. Hence the Meccano-set tag.
The official appellation was the Sainsbury Body, after its designer.
It remained unique, and served out its days in red/white, ie pre-war, livery,
on routes from Alperton garage, (ON), from May 1950 until December 1953.
During the early part of 1954 it was a staff bus.
It appears from black/white photos to have had red or black mudguards at various times.